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    • 14. 发明授权
    • Color image reading apparatus and method
    • 彩色图像读取装置及方法
    • US5781314A
    • 1998-07-14
    • US662260
    • 1996-06-14
    • Masahiro Mochizuki
    • Masahiro Mochizuki
    • H04N1/60H04N1/40H04N1/04H04N1/46
    • H04N1/6027
    • A color image reading apparatus improves the reproducibility of colors at the black level end of the brightness scale of each of component color images of an original medium. The color image reading apparatus includes an illuminating unit that illuminates the original medium such as a film original, an imaging device that forms images of the original medium based on three component colors of red, green and blue and outputs a red color signal, a green color signal and a blue color signal, a gain controlled amplifying device that amplifies each of the component color signals output from the imaging device and a gain setting device that sets a common, adjustable gain for each of the component color signals using the single amplifying device.
    • 彩色图像读取装置提高了原始介质的每个分量彩色图像的亮度标度的黑色水平端的颜色的再现性。 彩色图像读取装置包括照射原稿的原始介质的照明单元,成像装置,其基于红色,绿色和蓝色的三种颜色形成原始介质的图像,并输出红色信号,绿色 彩色信号和蓝色信号;增益控制放大装置,其放大从成像装置输出的每个分量颜色信号;以及增益设置装置,其使用单个放大装置为每个分量颜色信号设置共同的可调增益 。